Bump actions/download-artifact from 7 to 8

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 7 to 8.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...v8)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -75,7 +75,7 @@ jobs:
             -   name: Remove old file from Ubuntu
                 run: rm -f builds/iconify
 
-            -   uses: actions/download-artifact@v7
+            -   uses: actions/download-artifact@v8
                 with:
                     name: iconify
                     path: builds
@@ -95,7 +95,7 @@ jobs:
             -   name: Remove old file
                 run: rm -f builds/iconify
 
-            -   uses: actions/download-artifact@v7
+            -   uses: actions/download-artifact@v8
                 with:
                     name: iconify
                     path: builds